Definition: Mesoplanktonic is a term used in scientific literature to describe marine organisms that are primarily composed of dead, decomposing material from the oceans. These organisms are known for their unique ability to absorb nutrients and energy from the surrounding environment, which allows them to survive and thrive on the ocean floor. In the context of mesoplanktonic organisms, they can be categorized into two main groups: microalgae and macroalgae. Microalgae primarily consist of algae that are found in